Ukko Kari Posted August 23, 2019 Report Share Posted August 23, 2019 Starting work on a pair of subwoofers utilizing the 8 ohm version of the DS115. Ports are sonotube, and to make them fit in the enclosure, they will have a 90 degree bend. The external dimensions of the enclosure will be 49 inches tall, 36 inches wide by 24 inches deep. Dual 9.25 inch sonotube ports will eat up about 4 cubic feet of room in the box, driver is .53 cubic feet. Bracing will be fit around the ports and the driver. External cabinet volume is 24.5 cubic feet, or 693.76 liters. Time is sparse to work on these, so they likely will not be operational until the new year. Quote Link to comment Share on other sites More sharing options...
Ricci Posted August 23, 2019 Report Share Posted August 23, 2019 Subscribed for the fancy port work if nothing else. 😂 Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted September 4, 2019 Author Report Share Posted September 4, 2019 One port out of 4 ready, second one is almost complete. 1 Quote Link to comment Share on other sites More sharing options...
Kyle Posted September 4, 2019 Report Share Posted September 4, 2019 Nice job with the bend! Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted September 4, 2019 Author Report Share Posted September 4, 2019 Thanks! 'Respiro Del Diavolo' is the name I am kicking around for these. 😀 Quote Link to comment Share on other sites More sharing options...
lilmike Posted September 4, 2019 Report Share Posted September 4, 2019 Man, that turned out nice and clean! Doesn't look anything like ice cream though... Quote Link to comment Share on other sites More sharing options...
dgage Posted September 4, 2019 Report Share Posted September 4, 2019 Looks great. How smooth did it turn out on the inside? Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted September 5, 2019 Author Report Share Posted September 5, 2019 This is a shot of the inside of the elbow before the other lengths were added. A few coats of Duratex with sanding in between make the surface fairly smooth. 2 Quote Link to comment Share on other sites More sharing options...
dgage Posted September 5, 2019 Report Share Posted September 5, 2019 Wow! Great job! Fantastic attention to detail. Can’t wait to see the final result. 1 Quote Link to comment Share on other sites More sharing options...
Ricci Posted September 5, 2019 Report Share Posted September 5, 2019 Great fabrication work buddy. Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted September 15, 2019 Author Report Share Posted September 15, 2019 Ports are complete, PL max is curing, and 4 out of 6 pieces of wood are glued together, I had a good friend and AES fellow come by and help out. 1 Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted September 15, 2019 Author Report Share Posted September 15, 2019 Quote Link to comment Share on other sites More sharing options...
peniku8 Posted September 15, 2019 Report Share Posted September 15, 2019 I can't help but to think that the driver looks different from mine. This one looks more like the 18DS115 Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted September 16, 2019 Author Report Share Posted September 16, 2019 Side panels are just clamped in place at the moment, and bracing is not fully complete yet. From a quick and dirty estimate, cone excursion minima is in the 17-18 hz range. Edit: quick impedance measurement taken, tuning looks to be 17.6 hz. Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted September 17, 2019 Author Report Share Posted September 17, 2019 Added a screen shot of the impedance simulation for 16.5 cu ft net, 17.6 hz tuning. Quote Link to comment Share on other sites More sharing options...
Ricci Posted September 19, 2019 Report Share Posted September 19, 2019 Looks good man. Are you building a pair of these or just 1? You forgot to post tuning with one of those ports stuffed. Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted September 19, 2019 Author Report Share Posted September 19, 2019 I will be building a pair, have some materials on hand for the second one now, but have to go out of the city for work so it will be some time before I complete both of them. I can certainly stuff one port and check the tuning. Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted September 21, 2019 Author Report Share Posted September 21, 2019 Stuffed one port with a pillow, but I find it hard to nail down tuning exactly with the inexpensive homemade jig, though it looks close to 14 hz, which will drop some when the cabinet is standing upright, and the ports are closer to the floor. Quote Link to comment Share on other sites More sharing options...
Ricci Posted September 23, 2019 Report Share Posted September 23, 2019 That sounds about right. Might be useful for HT if you find you aren't using all of the headroom a pair will provide. Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted October 20, 2019 Author Report Share Posted October 20, 2019 Not much of an update, since I haven't had a chance to work on this box or it's mate, but here's a few more pictures. There was a small error in the angle of the slices cut with a homemade large miter box and a handsaw, which were edge sanded before gluing, which resulted in a greater than 90 degree angle. The bottom and top of the enclosure need bracing, which will be tied into the front and back, and a few side to side braces will be installed around the driver beside the port before gluing up the last side. 1 Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted October 20, 2019 Author Report Share Posted October 20, 2019 Quote Link to comment Share on other sites More sharing options...
dgage Posted October 20, 2019 Report Share Posted October 20, 2019 I thought you were doing a really nice build but that 85 degree port is unacceptable and you probably need to start over. Just kidding. I think it looks great. Great job and you should be very happy. 2 Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted February 11, 2020 Author Report Share Posted February 11, 2020 Almost 2 months away from home, with little time to work on these boxes. One box is completely assembled and flush trimmed, needs roundovers and Duratex. 1 Quote Link to comment Share on other sites More sharing options...
Ricci Posted February 18, 2020 Report Share Posted February 18, 2020 That's a nice looking speaker setup. Don't think I'd kick it out of my room. Quote Link to comment Share on other sites More sharing options...
Ukko Kari Posted January 3, 2021 Author Report Share Posted January 3, 2021 Moving up and down stairs to roundover, sand, fill any tear out, sand and paint was a bit of a chore, requiring assistance of a hand cart, ratchet straps and a strong volunteer. Also, the number of good weather days were limited, coupled with working away from home a lot meant that I could not spend as much time working on these as I would have liked at a time. Second one is partially assembled. 2 Quote Link to comment Share on other sites More sharing options...
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